I think this would be quite convenient, so bun. But I
think a specific website may be considered
inappropriate for a public-use schema not sure.
Either way, how do you handle other languages of
Wikipedia, such as de.wikipedia.org? "wp/en:dog",
"wp/de:Hund" might work.

[Vernon], the idea is not to get you to the Wikipedia
article faster. It's to *create a link* to the Wikipedia
article faster. The halfbakery equivalent of this
reddit-centric (really, Markdown-supporting website-
centric) idea would be typing "wikipedia:dog" instead
of "https://en.wikipedia .org/wiki/Dog" in the
halfbakery link URL field.

If you want to get to Wikipedia articles faster, set up
a search shortcut in your browser. I just have to type
"wp" followed by a space in my omnibar, and it gives
me native Wikipedia search right there, complete
with suggestions. The URL for that purpose, in case
anybody wants it, is <https://en.wikipedia
.org/w/index.php? title=Special:Search &search=%s>.
(Remove the spaces I was forced to add to get that to
fit 1999's column width. *cough*[jutta]*cough*) The
one you get by right-clicking Wikipedia's search field
results in not getting suggestions, for some reason.